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The new stream cipher algorithm ZUC has been adopted to be the kernel of the third set of the LTE cryptographic algorithms. These security algorithms are used to ensure the data confidentiality and integrity protection during its transmission over the air interface in the LTE Network. In the present paper, we are interested in studying the internal structure of ZUC algorithm and its different operation modes. In addition, we will focus on its analytical evaluation to give a clear idea of its efficiency.

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Cybercrime is rising due to the appearance of a new generation of attacks, APT and AET, and the reactionary aspect of the protection systems implemented in the IP networks. In this chapter, the authors analyze the gap between the innovative aspect of those attacks and the reactive aspect of the security measures put in place inside victim networks. The challenge is to shift this security aspect from reactive to proactive by adopting a collaborative approach based on NAC technology as a multi-level protection and IF-MAP as a security standard exchange protocol. First, a brief overview of NAC and IF-MAP is given. Then, the authors analyze the anatomy of these chained exploits and their escape techniques in order to propose an approach able to counter such attacks through the convergence towards a security ecosystem having the correlative intelligence to respond to challenges in real time and in a proactive way.